72008240 has 20 divisors (see below), whose sum is σ = 167419344. Its totient is φ = 28803264.

The previous prime is 72008221. The next prime is 72008329. The reversal of 72008240 is 4280027.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449972 + ... + 450131.

Almost surely, 2^72008240 is an apocalyptic number.

It is an amenable number.

72008240 is an abundant number, since it is smaller than the sum of its proper divisors (95411104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72008240 is a wasteful number, since it uses less digits than its factorization.

72008240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900116 (or 900110 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 72008240 is about 8485.7669070038. The cubic root of 72008240 is about 416.0326342742.

Adding to 72008240 its reverse (4280027), we get a palindrome (76288267).

The spelling of 72008240 in words is "seventy-two million, eight thousand, two hundred forty".